I peeked inside a couple of them (some of the folks were attending the same sailing conference we were at). They were very nicely equipped--nice galley, sitting area, sleeping area, head. Not much more you need than that--plus the critters are close by, although I wouldn't want to try to back one up.
Its hard enough backing up a 35-foot standard Class A. I've gotten spoiled with the rear TV camera though - I flattened more than a few small trees and bicycles before I got wise and installed one.